When one can quote the exact words of Prince and show that they are not biblical, that should be enough. He does teach what he is accused of teaching and his own words bear witness to his nonsensical theology.
Mr. Prince simply echoes the logical conclusions of the once saved always saved doctrine. If OSAS is true, then grace is "hyper" and a believer can sin and God's grace will cover it.
There is really little difference between OSAS and the teachings of the hyper-grace mentality (like Mr. Prince). If you want to believe in OSAS, then be honest and consistent and acknowledge that hyper-grace and Mr. Prince are also what you logically believe.
As for me, I believe in God's grace and salvation by grace through faith, not of works.
Though I definitely do not agree with Eternally Grateful on this subject, I respect him for being consistent by believing in both OSAS and hyper grace. Some others here claim to believe in OSAS but deny hyper-grace - that makes no sense to me!